100 results about "Pressure increase" patented technology

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).

The utility model discloses a full -automatic embedded part injection molding takes out piece packaging machine belongs to injection molding machine technical field, it includes work table, work table top fixed mounting has fixed mould, the fixed mould is buckled and is connected with embedded part main part, the sliding block with the guide rail sliding connection, the sliding block is located between the guide rail with the embedded part main part, the guide rail is the inclined structure, the utility model discloses through the heat absorption block absorption external heat like the heat source of mould processing, the heat transfer to first air cylinder, and the heated expansion gas (like nitrogen) in first air cylinder and second air cylinder expands in volume because temperature rises, and pressure increases, and the telescopic link of movable block outside pushes the sliding block and slides on the inclined guide rail, because the guide rail is the inclined structure, the sliding of sliding block will produce the component force along the guide rail direction, and then will embedded part main part extrude to the inboard of fixed mould, avoids in the injection molding process and causes the displacement of embedded part to influence injection molding effect.

Provided is a method for evaluating the air tightness of a case, which can achieve space saving and cost reduction and can shorten the time required for evaluating the air tightness of a plurality of cases. This method for evaluating the airtightness of a housing comprises: a first pressurization / depressurization step in which a first pump connected to a first housing via a first pipe is operated to depressurize or depressurize the inside of the first housing; a first pressure change measurement step for measuring the amount of pressure change in the first housing by means of an evaluation device connected to the first housing via a second pipe after the pressure in the first housing is stabilized; and a first evaluation step for evaluating the airtightness of the first housing by means of an evaluation device on the basis of the amount of change in pressure within the first housing, in which a first valve provided in the first pipe is opened, a second valve provided in the second pipe is closed, a first pressure increasing / decreasing step is performed, the first valve is closed, and a second pressure increasing / decreasing step is performed. A first pressure change measurement step is performed by opening the second valve.

The present application belongs to the field of railway technology, and relates to a turnout area snow melting and deicing device, which comprises a shell, a pressure increasing device, and a driving device connected with the pressure increasing device. The shell comprises a first cavity which is arranged as a sealed cavity. The driving device and the pressure increasing device are arranged in the first cavity. The driving device is provided with at least one gas passage. The gas passage is in communication with the outside of the first cavity at the gas inlet end, and in communication with the inside of the first cavity at the gas outlet end. The air outlet of the pressure increasing device is in communication with the outside of the shell. The driving device drives the pressure increasing device to act. Negative pressure is generated at the air inlet of the pressure increasing device. Under the action of the pressure difference between the inside and outside of the first cavity, the gas outside the first cavity enters the first cavity through the gas passage, is sucked into the pressure increasing device, is compressed in the pressure increasing device, and is sprayed out of the air outlet of the pressure increasing device. The driving device and the pressure increasing device rotate synchronously. The compressed high-pressure air is sprayed out of the air outlet of the pressure increasing device at high speed. The device is convenient to install and use.

The invention provides an air-water pressure balance experiment device and an experiment method. The air-water pressure balance experiment device comprises a cylinder body, a water pressure sensor, a water injection device and an air inflation device. In the experiment process, a soil sample can be added into the cylinder, a water source is input into the cylinder through the water injection device, so that the water source is saturated in the soil sample, then the air inflation device inflates air into the cylinder through the air injection ring, the soil sample can be filled with air along with the increase of the pressure of the inflated air, and the water source is filled into the cylinder through the air injection ring. Whether an inflation mode can play an effective role in cutting off a water source is judged by monitoring whether the water source is still discharged from the drainage pipe, the height of air in the soil sample rises upwards along with the increase of air pressure, and when the air spreads to the corresponding water pressure sensor, the pressure value of the water pressure sensor is increased along with the increase of the air. Therefore, the spreading depth of the air and the corresponding pressure value under the corresponding soil sample can be obtained, and data support is provided for later foundation pit water seepage prevention.

The utility model relates to the technical field of gas-liquid mixed transportation pressurization, in particular to a gas-liquid mixed transportation pressurization device which comprises a shell, a front cover and a rear cover, the front cover is installed on one side of the shell, the rear cover is installed on the side, away from the front cover, of the shell, an inlet is formed in one side of the upper portion of the shell, and an outlet is formed in the other side of the upper portion of the shell. When the supercharging device is used, the eccentric shaft drives the cock to slide tightly close to the interior of the shell, the shell forms a closed cavity which changes periodically, negative pressure is generated in the shell to suck a medium, the cock extrudes the medium in the shell to achieve the purpose of supercharging conveying, and the cock is tightly attached to the shell to reduce mechanical friction. And large torque is provided through an eccentric structure formed by the eccentric shaft, the cock and the interior of the shell, operation noise is reduced, and noise pollution generated when the device is used is reduced.

The application discloses a pipeline structure for multistage compressor series connection, which comprises a first pipe body and a second pipe body connected with each other, a first cavity, a second cavity and a third cavity are sequentially arranged in the first pipe body along the length direction, the cross-sectional dimension of the second cavity is smaller than that of the third cavity; a fourth cavity and a fifth cavity are sequentially arranged in the second pipe body along the length direction, the cross-sectional dimension of the fourth cavity is smaller than that of the third cavity; a valve body is slidably arranged in the third cavity, the length of the valve body is smaller than the depth of the third cavity, and a flow channel communicating with the third cavity and the fourth cavity is arranged in the valve body. The application can automatically increase the pressure of the gas when the pressure of the gas is small, and can automatically make part of the gas directly jump over the pressure increasing stage when the pressure of the gas is large, which is beneficial to optimizing the load distribution and effectively improving the pressure increasing efficiency and the cycle transfer efficiency of the multistage compressor.

The utility model relates to the technical field of micro-water sensors, in particular to a precise micro-water sensor. According to the technical scheme, the pressure relief device comprises a device body, an air inlet and an air outlet are formed in the device body, the pressure relief device further comprises a pressure relief compensation module installed on the air inlet, the pressure relief compensation module comprises a connecting hole communicated with the air inlet and an exhaust hole communicated with the outside, and the pressure relief compensation module is connected with the air inlet according to the air flow rate at the air inlet. And the flow rate of gas entering the connecting hole and the exhaust hole is controlled. Through the arrangement of the pressure relief compensation module, when the external air pressure is increased, the external air pressure can be effectively relieved, the flow rate of air entering the air inlet hole is prevented from being increased, the bearing range of the machine body to the external air pressure can be effectively enlarged, and the flow rate of the air in the machine body is prevented from exceeding the specified range.

The power storage device includes a housing having a frame member and a power storage unit (power storage module) housed in the housing. The frame member is provided with an exhaust path that guides the gas discharged from the power storage unit to the outside of the housing. The exhaust path is provided with a blocking member (detection member) that blocks the exhaust path. The blocking member is configured to be broken by a pressure increase due to the gas discharged from the power storage unit.

The invention relates to the technical field of rock core experimental analysis of oil and gas field development, in particular to a reservoir permeability stress sensitivity determination method, system and equipment and a storage medium. The method comprises the steps that the confining pressure of a rock core holder is periodically increased and decreased according to the same pressure intensity difference; after each confining pressure rising and falling period, calculating the current effective stress and rock core permeability sensitivity of the target rock core, and calculating the relative deviation between the current effective stress and rock core permeability sensitivity of the target rock core and the current effective stress and rock core permeability sensitivity of the target rock core after the previous confining pressure rising and falling period; and repeating the method until the relative deviation is smaller than a threshold value, and taking the current effective stress and the core permeability sensitivity as the permeability stress sensitivity of the corresponding gas reservoir. The gas reservoir permeability stress sensitivity evaluation method provided by the invention is simple to operate and reliable in experimental result, and can quickly, effectively and conveniently evaluate the gas reservoir permeability stress sensitivity degree.

The invention provides a method for judging crack initiation of low-maturity shale in supercritical carbon dioxide heating, and belongs to the technical field of low-maturity shale. Carrying out a high-temperature mechanical experiment, a hydrocarbon generation pressurization experiment, a pyrolysis kinetics experiment and a supercritical carbon dioxide soaking experiment to calibrate key coefficients, substituting the parameters into a multi-field coupling crack initiation pressure formula to calculate the crack initiation pressure at each moment, inputting a physical constraint diagram attention recursive network to output and correct the crack initiation pressure and safety margin, and calculating the crack initiation pressure. And when the safety margin is lower than an early warning threshold value, the crack initiation moment is predicted through a two-step approximation method, and construction parameters are adjusted, so that the technical problem that the crack initiation moment of the low-maturity shale in supercritical carbon dioxide heating cannot be accurately judged in real time under the multi-field coupling condition is solved.

This application relates to a method and system for removing water from a carbon dioxide fluid using triethylene glycol, and the application of this method in transporting supercritical carbon dioxide fluid. The method includes calculating a correction factor: obtaining a correction factor R based on the critical pressure of the carbon dioxide fluid according to formula (I): R = 0.7195 - 0.02729P c +0.0118T(I), where P c The critical pressure of the carbon dioxide fluid is given by T, where T is the temperature range of 20℃-30℃; the corrected pressure is calculated using formula (II). b :P b =P c *R(II); Pressure-boosted dehydration: The pressure of the carbon dioxide fluid is increased to the corrected pressure P through multi-stage pressure-boosted cooling. b The process involves cooling to remove some of the water from the carbon dioxide fluid, with the temperature after each stage of pressurization and cooling controlled within the range of 20°C to 30°C. Triethylene glycol dehydration is then performed, using a triethylene glycol absorbent to further remove water from the pressurized and dehydrated carbon dioxide fluid. The method and system of this application can reduce energy consumption and lower process costs.

The invention belongs to the technical field of nuclear reactor monitoring, and particularly relates to a neutron tube air pressure real-time monitoring method and system, and the method comprises the steps: obtaining basic electrical parameters and environmental data of a neutron tube work period, and carrying out the statistical calculation, obtaining hydrogen storage device average voltage, hydrogen storage device average current, an ion source output flow average value and an ion source output flow standard deviation, and calculating an effective thermal thrust index, a beam fluctuation index and a thermoelectric conversion quality score; obtaining a corrected air pressure value; converting the corrected air pressure value into a real-time physical air pressure value; on the basis of the real-time physical air pressure value, generating a pressure increasing, pressure reducing or maintaining adjusting instruction; adjusting the current of the hydrogen storage device according to the adjusting instruction. The method effectively solves the problem that the traditional method is difficult to accurately invert the real air pressure in the pipe through a single dimension, resulting in lagging or misalignment of air pressure adjustment.

This utility model discloses a metal explosion-proof valve, belonging to the field of explosion-proof valve technology. It includes a base with several mounting holes, a pressure cap fitted onto the base, several brackets fixedly mounted on the side of the base, and an electric actuator fixedly mounted between the brackets. The piston rod end of the electric actuator engages with the pressure cap. Several elastic units are provided on the side of the base, and these elastic units also engage with the pressure cap. Several fixing rods are fixedly mounted on the side of the base. By configuring the base in conjunction with the pressure cap, electric actuator, and spring, when flammable and explosive gases are generated inside the sealed equipment enclosure, causing excessive pressure, the electric actuator is activated. The electric actuator drives the pressure cap to open, achieving rapid venting and pressure relief. When thermal runaway further deteriorates, causing the electric actuator to lose power, the pressure increases to exceed the spring force, which in turn drives the pressure cap to open passively, thus achieving both active and passive dual safety protection functions.

The application relates to the technical field of blood pressure simulator calibration, and discloses a blood pressure simulator repeatability calibration method and a calibration device, which comprises the following steps: locking static pressure through micro-volume adjustment of a pressure building cylinder to evaluate signal stability; utilizing dynamic compensation of pressure building cylinder volume and pressure reducing valve opening degree adjustment to make the gas path pressure linearly and uniformly decrease at a set rate, and synchronously collecting full envelope data; adopting a numerical fitting algorithm to construct an envelope model to position actual average pressure; repeatedly performing multiple measurements and calculating experimental standard deviation to obtain repeatability results. The device comprises a host computer, a mainboard, a driver and a gas path system, wherein a gas pump, a gas capacitor and a pressure increasing valve are connected in series in the gas path system, and a pressure reducing valve, a pressure building cylinder and a high-precision module are connected in parallel in a common gas path. Through the cooperative control of the pressure building cylinder and the pressure reducing valve, the application solves the problem of pressure reducing nonlinearity, improves the accuracy of actual average pressure positioning and the precision of repeatability evaluation.

The invention provides a long-distance pipeline hydrostatic test innovation method and related equipment, and the method comprises the steps: carrying out the pressure test segmentation of a long-distance pipeline based on the related parameters of the long-distance pipeline, so as to obtain a first-stage pipe section; according to a water filling control condition, the pipe section of the stage is filled with water, so that a pipe section of a second stage is obtained; continuously injecting water into the pipe section in the second stage to increase the pressure of the pipe section in the second stage to thermodynamic equilibrium pressure to obtain a pipe section in a third stage; boosting the pipe section of the third stage to obtain a first detection result and a pipe section of a fourth stage; in response to the fact that the first detection result is qualified, the air existing amount in the pipe section is calculated, and a second detection result and the pipe section of the fifth stage are obtained; performing a sealing test on the pipe section in response to the fact that the second detection result is qualified so as to obtain a third detection result; and if the third detection result is qualified, determining that the quality of the long-distance pipeline is qualified. Through the method, the accuracy of quality detection of the long-distance pipeline can be improved.

The utility model discloses a vortex type gas multiphase mixed transportation supercharging device, which relates to the technical field of oil exploitation, and comprises a fixed shell and a mixing pipe, the fixed shell is internally provided with a transmission mechanism for conveying oil, and one side of the fixed shell is fixedly connected with a liquid pumping pipe in a penetrating manner; the top of the end, away from the liquid pumping pipe, of the fixing shell is fixedly connected with a guiding-out pipe in a penetrating mode, a fixing shaft is rotationally connected into the mixing pipe, a first motor is fixedly connected to one side of the mixing pipe, a transmission shaft of the first motor is fixedly connected to one end of the fixing shaft, and first spiral blades, mixing blades and rotating blades are fixedly connected to the surface of the fixing shaft. The problems that after pressurization, the oil pressure and the flow speed in the device are increased, the fusion degree of gas is possibly not enough when the gas is mixed, slug flow is formed when the fusion degree of the gas is not enough, so that the pressure fluctuation of a pipeline is violent, and gas-liquid separation is not thorough easily when separation is needed in the later period are solved.

The application discloses a kind of quasi-triaxial rock mechanics testing device, belong to oil and gas exploitation technical field.It includes: the confining pressure oil is stored in confining pressure chamber, and the confining pressure chamber is in full oil state;Delivery component, the delivery component is used to send experimental sample to the confining pressure chamber;Liquid level adjusting component, the liquid level adjusting component is connected with the confining pressure chamber for adjusting the oil liquid saturation state of confining pressure oil in the confining pressure chamber;Pressure increasing component, the pressure increasing component is connected with the confining pressure chamber for applying confining pressure to the sample in the confining pressure chamber;Pore pressure adjusting component, the pore pressure adjusting component is connected with experimental sample for applying pore pressure to experimental sample;Temperature adjusting assembly, the temperature adjusting assembly is connected with the confining pressure chamber for adjusting the temperature of confining pressure oil in the confining pressure chamber.The confining pressure chamber is set to store confining pressure oil, without oil injection before each test, oil discharge after test, avoid the time consumption of injection / oil discharge, effectively improve the test efficiency.

The invention provides a compressor which can effectively reduce stop pressure according to operation cycle time regardless of continuous operation based on an unloading function or a speed change function based on an inverter. The compressor (100) comprises an electric motor (104), a compressor body (103) driven by the electric motor (104) to generate compressed gas (109), a container (10) for storing the compressed gas (109) generated by the compressor body (103), a pressure detector (112) for detecting the pressure of the compressed gas (109) in the container (107), and a control part (115) for controlling the power supplied to the electric motor (104) according to the detection result of the pressure detector (112). The control unit (115) determines whether or not a pressure increase / decrease period (TOFF + TON) for the pressure reaching the stop pressure (202), the pressure decreasing to the start pressure (204), and the pressure reaching the stop pressure (202) exceeds a first period threshold value (210), and decreases the stop pressure by a first pressure change value (PECO or 2PECO) when the pressure increase / decrease period exceeds the first period threshold value (210).

A system and method for replenishing a liquefied fuel (e.g., hydrogen) is provided. The system includes a cryogenic tank for storing a liquefied fuel, a pump insertable into the cryogenic tank, and a switching valve. The pump has a piston, an inlet, and an isolation valve configured to supply the liquefied fuel to the inlet. The switching valve is controlled to flow vapor from the pump and the liquefied fuel contacting a backside of the piston to the inlet of the pump. At least one block valve is also connected with the cryogenic tank and the pump. At least one of the switching valve, the at least one block valve, and the isolation valve is controllable to operate the system in one of three operating modes including a pressure increase mode, a pressure hold mode, and a pressure decrease mode.

This invention discloses a method and system for predicting heat leakage and detecting pressure rise characteristics of a liquid hydrogen container. The method involves establishing a three-dimensional thermal flow field model of the liquid hydrogen container; calculating the heat flux density at the gas-liquid interface based on the three-dimensional thermal flow field model to adjust the liquid hydrogen evaporation rate; obtaining the total heat leakage through finite element simulation and experimental data co-calibration; calculating the static evaporation rate based on the total heat leakage; establishing a nonlinear mapping model between the static evaporation rate and the pressure rise rate using response surface regression; monitoring the wall temperature distribution of the liquid hydrogen container in real time; calibrating the thermophysical parameters using a dynamic calibration algorithm via an LSTM neural network; and correcting the output results of the three-dimensional thermal flow field model. By establishing a three-dimensional thermal flow field model of the liquid hydrogen container, the nonlinear response relationship between the evaporation rate and the pressure rise rate of the liquid hydrogen container is clarified, and a cloud-edge collaborative detection system is constructed to accurately predict the heat leakage performance of the liquid hydrogen container and achieve efficient pressure rise rate detection.

The application discloses a raw medicine mixing machine stirring shaft sealing reinforcing assembly, which comprises an assembling sleeve, and an inner sleeve is fixedly connected to the inside of the assembling sleeve. The inside of the assembling sleeve forms a gas flow cavity after installation, and a micro pressure sensor is matched. When the pressure increase in the inside of the assembling sleeve is detected to be large, the pressure in the mixing machine changes. The assembling sleeve is injected with gas by a gas supply device, the gas pressure in the inside of the assembling sleeve is increased, the static ring and the dynamic ring are secondarily extruded, the sealing effect is increased, the medicine in the mixing machine is prevented from flowing out, and the upper and lower double sealing type design is adopted, the sealing effect is further increased, the inside pressure is adjusted according to the pressure change in the mixing machine, the sealing part is prevented from being excessively abraded due to the excessively high pressure, the sealing failure is avoided when the pressure is reduced, the sealing reliability is remarkably improved, and the maintenance frequency is reduced.

A pneumatic load balancing system comprises a pressure sensor for determining the pressure in a chamber of the actuating cylinder, and a controller for controlling the air pressure in the chamber of the actuating cylinder via at least one air supply valve. The controller is configured to during a load balancing sequence continuously or periodically obtain a current air pressure in the chamber from the pressure sensor when supplying air to the chamber via said at least one air supply and to determine a balancing air pressure in the chamber when, if air fed to the chamber, the air pressure stops increasing or when the gradient of the pressure increase is below a pre-determined threshold value; or if the air pressure is let out from the chamber, the air pressure starts to decrease. The balancing air pressure thus determined is then used as the balancing air pressure for the actuating cylinder of the pneumatic load balancing system. Hereby an automatic setting of the air pressure required for load balancing can be achieved. The user does then not need to manually feed the required air-pressure and the system will use the correct air-pressure and mistakes in setting of the air pressure can be avoided.

The present application relates to the technical field of pipeline noise elimination, and in particular to a precision filter sealing detection method and device, which collects air pressure during pressure increase and pressure maintenance at different temperature levels, determines real air pressure sequence, standard air pressure sequence, pressure increase time period and pressure maintenance time period of the same temperature level, determines temperature influence degree of the precision filter, divides leak sub-time periods from the pressure increase time period and the pressure maintenance time period respectively, determines intermittent leakage degree corresponding to the same temperature level according to the duration of all leak sub-time periods divided from the same temperature level, the duration of the pressure increase time period and the pressure maintenance time period, and completes sealing detection of the precision filter in combination with the difference between all temperature levels and actual temperature of the precision filter sealing detection and the temperature influence degree of the precision filter. The present application can improve the accuracy of precision filter sealing detection.

The present invention relates to a hyperbaric oxygen chamber including a sealing gasket. The hyperbaric oxygen chamber comprises: a chamber comprising a first flange formed to protrude inward from the circumferential surface of an opening / closing port; and a gasket provided to surround the first flange in order to seal the space between same and a door part opened / closed inside the chamber, the gasket being shaped to partially surround the circumferential surface of the opening / closing port. According to the present invention, the gasket is shaped to surround the flange protruding from the opening / closing port of the chamber such that the chamber can be sealed more effectively, and the wing part of the gasket is continuously in close contact with the inner circumferential surface of the door part such that, even if the pressure inside the chamber increases, the gasket can maintain the sealing without being separated.

Exemplary embodiments can determine the temperature setpoint of the outlet heater or cooler (114) based on available information without requiring user input or with only minimal user input. Exemplary embodiments can estimate the temperature setpoint of the outlet heater (114) based on available information such as the pressure increase along the column (110), the temperature at the inlet (6) of the column (110), and the volumetric flow rate. In some cases, the estimate can be normalized for column dimensions such as length and diameter. A tailing factor can also be used to determine the estimate. The estimate is computationally not burdensome and can be recalculated while the column is in use.

The utility model provides a high-pressure fuel pump which is characterized in that the high-pressure fuel pump comprises a pump body, the pump body is connected with an oil inlet nozzle and an oil outlet nozzle, and the pump body is internally provided with a compression cavity; the pressurizing assembly is used for compressing the fuel oil in the compression cavity; the low-pressure buffer chamber is communicated with the oil inlet nozzle; the electromagnetic valve assembly is used for connecting the low-pressure buffer cavity and the compression cavity and controlling the output fuel oil quantity and oil pressure, the electromagnetic valve assembly comprises a valve element assembly and a valve seat, and the valve element assembly and the electromagnetic valve seat are welded and fixed; the one-way valve assembly is used for connecting the oil outlet connector and the compression cavity; and the oil inlet seat is connected to the upper part of the pump body. The sealing performance is still good under high pressure through a closed structure formed by welding and fixing the valve element assembly and the electromagnetic valve seat.

The utility model discloses a high-pressure gas insulation container with a pressure balancing function, which comprises an insulation tank and a high-pressure adjusting device, the outer wall of the high-pressure adjusting device is fixedly connected with a gas exchange tank, the inner wall of the gas exchange tank is fixedly connected with a low-pressure adjusting device, the top of the insulation tank is fixedly connected with a pressure monitoring meter, and the top of the insulation tank is fixedly connected with the low-pressure adjusting device. An alarm device is fixedly connected in the pressure monitoring meter. The utility model relates to the technical field of power equipment. According to the high-pressure gas insulation container with the pressure balance function, through the low-pressure adjusting device and the gas exchange tank, the insulation tank which is influenced by high temperature of a circuit and has increased pressure can be subjected to pressure relief treatment, and after the temperature of the insulation tank returns to normal, high-pressure gas in the gas exchange tank is sent back into the insulation tank, so that the pressure balance in the insulation tank is maintained; and the influence of a high-voltage circuit on the insulation tank is reduced, so that the insulation tank is difficult to deform or fail in insulation.

To prevent a reduction in the lifespan of bellows in a bellows-type gas compressor. [Solution] The system comprises a pressurized container 1 filled with pressurized fluid, a bellows 2 that partitions a portion of the inside of the pressurized container 1 and is supplied with a gas to be compressed, a pump 18 that increases the pressure inside the pressurized container 1, and a balance piston 6 that divides the inside of the pressurized container 1 into a space 7b outside the bellows 2 and a space 7a that is pressurized by the pump 18. The balance piston 6 transmits the pressure increase from the pump 18 to the pressurized fluid outside the bellows.